US20180149257A1 - Cam follower and yoke roller assemblies - Google Patents
Cam follower and yoke roller assemblies Download PDFInfo
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- US20180149257A1 US20180149257A1 US15/824,335 US201715824335A US2018149257A1 US 20180149257 A1 US20180149257 A1 US 20180149257A1 US 201715824335 A US201715824335 A US 201715824335A US 2018149257 A1 US2018149257 A1 US 2018149257A1
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- 230000000712 assembly Effects 0.000 title description 23
- 238000000429 assembly Methods 0.000 title description 23
- 230000004323 axial length Effects 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 28
- 238000005096 rolling process Methods 0.000 claims description 12
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 4
- 239000010962 carbon steel Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H53/00—Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
- F16H53/06—Cam-followers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
- F16C13/006—Guiding rollers, wheels or the like, formed by or on the outer element of a single bearing or bearing unit, e.g. two adjacent bearings, whose ratio of length to diameter is generally less than one
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
- F16C19/28—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with two or more rows of rollers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
- F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
- F16C33/7846—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with a gap between the annular disc and the inner race
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
- F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
- F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
- F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
- F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race
- F16C33/7856—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner race with a single sealing lip
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2361/00—Apparatus or articles in engineering in general
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
- F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
- F16C33/7823—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of sealing lips
Definitions
- FIG. 4 is front view of the split ring of the cam follower of FIG. 1 and the yoke roller of FIG. 2 .
- the inner surface 13 A′ of the roller assembly 10 ′ includes a first seal receiving pocket 40 A′ formed between the first radially inwardly extending flange 13 F 1 ′ and the first axial end 13 X′.
- a first annular seal 50 A′ is positioned in and seated in the first seal receiving pocket 40 A′, as described herein.
- a portion (i.e., a radially innermost portion) of the first annular seal 50 A′ slidingly and sealingly engages the inner member 14 ′ (i.e., an exterior surface 17 A′ of the inner member 14 ′).
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
- This application is a continuation in part of commonly owned and copending U.S. patent application Ser. No. 15/046,158 entitled “CAM Follower with Tire Having Axial Movement Mitigation Features”, filed on Feb. 17, 2016, which is a continuation in part application of and claims priority to U.S. patent application Ser. No. 14/577,126, filed on Dec. 19, 2014, which is a continuation in part application of and claims priority to U.S. patent application Ser. No. 13/678,031 entitled, filed on Nov. 15, 2012, which is a non-provisional application of and claims priority to U.S. Provisional Application No. 61/560,593, filed on Nov. 16, 2011, the contents of these applications are incorporated herein by reference in their entireties. This application is a continuation in part application of and claims priority to U.S. patent application Ser. No. 14/865,998, entitled “Self Lubricating CAM Follower Assembly”, filed on Sep. 25, 2015, which is a non-provisional application of and claims priority to U.S. Provisional Application No. 62/055,272, filed on Sep. 25, 2014, the contents of these applications are incorporated herein by reference in their entireties. This application is a non-provisional application of and claims priority to U.S. Provisional Application No. 62/428,099, entitled “CAM Follower and Yoke Roller Assemblies”, filed on Nov. 30, 2016, the entirety of which is incorporated by reference herein.
- The present invention is directed to a cam follower assembly and a yoke roller assembly and more specifically to a cam follower assembly and a yoke roller assembly having an axial thrust retainer, a double row of rolling elements and a thin profile seal.
- Cam follower assemblies and yoke roller assemblies are used in many industrial manufacturing and conveying applications. The cam follower assemblies and the yoke roller assemblies each typically include an outer ring disposed around an inner ring with a plurality of rolling elements such as needle rollers disposed in a cavity therebetween. An annular seal is positioned on each axial end thereof, between the inner ring and the outer ring to keep debris from entering the cavity. The seals occupy an axial length of the cam follower assemblies and the yoke roller assemblies.
- The size of the cam follower assemblies and yoke roller assemblies are generally limited to a predetermined envelope. For example, the axial length of cam follower assemblies may be limited a length of the cam that the cam follower rides on. The length of the yoke roller may be limited by the distance between yoke arms that the yoke roller is mounted on of on the length of the surface that the yoke roller engages. The length of the rolling elements is limited because of the axial length which the seals occupy. The outside diameter of the cam follower assemblies and the yoke roller assemblies may also be limited to a predetermined size.
- Cam follower assemblies and yoke roller assemblies are subject to high loads when used in various applications. The load capacity of the cam follower assemblies and yoke roller assemblies depends on the diameter and length of the rolling elements disposed therein. However efforts to increase the load capacity of the cam follower assemblies and yoke roller assemblies have been plateaued because of the above described size limitations.
- Based on the foregoing, there is a need for cam follower assemblies and yoke roller assemblies with increased load capacity.
- There is disclosed herein a roller assembly for a cam follower or a yoke roller. The roller assembly includes an outer ring having an interior area. The interior area is defined by an inner surface extending an overall axial length between a first axial end and a second axial end of the outer ring. The inner surface has a radially inward facing bearing surface extending between a first radially inwardly extending flange and a second radially inwardly extending flange. The roller assembly includes a one piece inner member extending into the interior area. The inner member has a groove formed therein between a third axial end and a fourth axial end of the inner member. The inner member extends continually between the third axial end and the fourth axial end: The roller assembly includes a retaining ring positioned in the groove. A first row of a plurality of first rollers is positioned in the interior area between and in rolling engagement with the inner member and the radially inward facing bearing surface. The first row of the plurality first rollers is positioned between and engages the retaining ring and the first radially extending flange. A second row of a plurality of second rollers is positioned in the interior area between and in rolling engagement with the inner member and the radially inward facing bearing surface. The second row of the plurality second rollers is positioned between and engages the retaining ring and the second radially extending flange. Each of the plurality of first rollers and each of the plurality of second rollers has a roller length and a roller outside diameter. A ratio of the roller length to the roller outside diameter is less than 2.8. The outer ring has a second outside diameter and a ratio of the second outside diameter to the roller outside diameter ranges from 7.25 to 9.75. The inner surface further includes a first seal receiving pocket formed between the first radially inwardly extending flange and the first axial end. A first annular seal positioned in and seated (e.g., press fit or otherwise fixedly secured) in the first seal receiving pocket. A portion of the first annular seal slidingly and sealingly engages the inner member. The first annular seal has a first overall axial width. The first overall axial width is no more than 6% of the overall axial length of the outer ring.
- In one embodiment, the first annular seal includes a metallic annular ring that has a mounting section located circumferentially around a radially outermost portion of thereof. The metallic annular ring has a first leg extending axially away and radially inward from the mounting section. The first leg has a radially and axially inward facing sloped surface. The metallic annular ring has a second leg extending radially inward from the first leg and terminating at a distal end. The first annular seal includes an elastomeric member that has a base secured to the radially and axially inward facing sloped surface. The elastomeric member has a flexible sealing leg extending away from the radially and axially inward facing sloped surface for sealing engagement with the inner member of the roller assembly. The flexible sealing leg terminates at a sealing engagement surface which extends radially inward from the distal end of the second leg. The metallic annular ring and the elastomeric member have an overall axial width configured to provide structural support and sealing and the overall axial width is from about 0.075 inches to about 0.080 inches to facilitate the extension of roller length without increase in overall length of the roller assembly, yielding increased load capacity of the roller assembly.
- In one embodiment, the mounting section includes a flap folded over a portion of the mounting section and forming a bend on a radially outermost portion of the mounting section for seating (e.g., press fitting or otherwise fixedly securing) in a groove of the outer ring of the roller assembly.
- In one embodiment, the first annular seal has an elastomeric member secured to an annular metallic ring.
- In one embodiment, the inner surface further includes a second seal receiving pocket formed between the second radially inwardly extending flange and the second axial end. A second annular seal is positioned in and seated (e.g., press fit or otherwise fixedly secured) in the second seal receiving pocket. A portion of the second annular seal slidingly and sealingly engages the inner member. The second annular seal has a first overall axial width and an overall axial width that is no more than 6% of the overall length of the outer ring.
- In one embodiment, the second annular seal includes an elastomeric member secured to an annular metallic ring.
- In one embodiment, the inner member is made from a carbon steel. In one embodiment a portion of the inner member has a carburized case hardened case depth of 0.03 to 0.04 inches. In one embodiment, the inner member has a surface hardness of 59 to 62 Rockwell C scale. In one embodiment, the inner member has a core hardness of 30 to 35 Rockwell C scale.
- In one embodiment, axial ends of the retaining ring engage the groove, the plurality of first rollers slidingly engage one of the axial ends of the retaining ring and the plurality of second rollers slidingly engage another of the axial ends of the retaining ring to limit axial movement of the outer ring relative to the inner member.
- In one embodiment, the inner member has a shaft that extends outwardly from the first axial end and/or the second axial end.
- In one embodiment, the inner member is an annular ring.
- There is further disclosed herein a thin profile seal for a roller assembly. The thin profile seal includes a metallic annular ring that has a mounting section located circumferentially around a radially outermost portion of thereof. The metallic annular ring has a first leg that extends axially away and radially inward from the mounting section. The first leg has a radially and axially inward facing sloped surface. The metallic annular ring has a second leg extending radially inward from the first leg and terminating at a distal end. The thin profile seal includes an elastomeric member that has a base secured to the radially and axially inward facing sloped surface. The elastomeric member has a flexible sealing leg extending away from the radially and axially inward facing sloped surface for sealing engagement with an inner member of the roller assembly. The flexible sealing leg terminates at a sealing engagement surface which extends radially inward from the distal end of the second leg. The metallic annular ring and the elastomeric member have an overall axial width configured to provide structural support and sealing. The overall axial width is from about 0.075 inches to about 0.080 inches, to facilitate the extension of roller length without increase in overall length of the roller assembly, yielding increased load capacity of the roller assembly.
- In one embodiment, the mounting section includes a flap folded over a portion of the mounting section and forming a bend on a radially outermost portion of the mounting section for seating in a groove of an outer ring of the roller assembly.
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FIG. 1 is cross sectional view of a cam follower assembly of the present invention; -
FIG. 2 is a cross sectional view a yoke roller assembly of the present invention; -
FIG. 3 is an enlarged cross sectional view of a seal portion of the cam follower ofFIG. 1 and the yoke roller ofFIG. 2 ; and -
FIG. 4 is front view of the split ring of the cam follower ofFIG. 1 and the yoke roller ofFIG. 2 . - As shown in
FIG. 1 a roller assembly for acam follower 100 is generally designated by thereference number 10. Theroller assembly 10 includes anouter ring 12 having aninterior area 13. Theinterior area 13 is defined by aninner surface 13A extending an overall axial length L between a firstaxial end 13X and a secondaxial end 13Y of theouter ring 13. Theinner surface 13A has a radially inward facing bearing surface 13B1, 13B2 extending between a first radially inwardly extending flange 13F1 and a second radially inwardly extending flange 13F2. - As shown in
FIG. 1 , theroller assembly 10 includes aninner member 14 extending into theinterior area 13. Theinner member 14 has agroove 15 formed therein and located between oppositeaxial ends inner member 14. A retainingring 16 is positioned in thegroove 15, as described herein. As shown inFIG. 4 the retainingring 16 is a split ring having anannular body portion 16B and agap 16G therein. - As shown in
FIG. 1 , theinner member 14 has ashaft 80 extending axially outward from the secondaxial end 14Y. Theshaft 80 includes ashank portion 81 and a threadedportion 82. The threadedportion 82 extends axially inward from anaxial end 80X of theshaft 80. In one embodiment theinner member 14 is manufactured from a carbon steel alloy. In one embodiment, the exterior surfaces 14B1 and 14B2 of the inner member have a carburized case hardened case depth of 0.03 to 0.04 inches. In one embodiment, the exterior surfaces 14B1 and 14B2 have a surface hardness of 59 to 62 Rockwell C scale. In one embodiment, the inner member and/or theshaft 80 have a core hardness of 30 to 35 Rockwell C scale. - As shown in
FIG. 1 , theroller assembly 10 includes a first row of a plurality offirst rollers 20 positioned in theinterior area 13 and in rolling engagement with the inner member 14 (i.e., an exterior surface 14B1 of the inner member 14) and the radially inward facing bearing surface 13B1. The first row of the pluralityfirst rollers 20 is positioned axially between and engaging the retaining ring 16 (i.e., a firstaxial end 16A of the retaining ring 16) and the first radially extending flange 13F1. - As shown in
FIG. 1 , theroller assembly 10 includes a second row of a plurality ofsecond rollers 30 positioned in theinterior area 13 and in rolling engagement with the inner member 14 (i.e., an exterior surface 14B2 of the inner member 14) and the radially inward facing bearing surface 13B2. The second row of the plurality ofsecond rollers 30 is positioned axially between and engaging the retaining ring 16 (i.e., a secondaxial end 16B of the retaining ring 16) and the second radially extending flange 13F2. - Thus, the first
axial end 16A, secondaxial end 16B, the first radially inwardly extending flange 13F1 and the second radially inwardly extending flange 13F2 limit axial movement of theouter ring 12 relative to theinner member 14. - As shown in
FIG. 1 , each of the plurality offirst rollers 20 and each of the plurality ofsecond rollers 30 have a roller length L1. In one embodiment, the ratio of roller length L to roller outside diameter D1 is less than 2.8 to provide increased load capacity compared to prior art roller assemblies. In one embodiment, the roller length L1 is about 0.410 inches and the dynamic load capacity of theroller assembly 10 is about 13,140 pounds. - Each of the plurality of
first rollers 20 and each of the plurality ofsecond rollers 30 has an outside diameter D1 and theouter ring 12 has an outside diameter D. A ratio of the outside diameter D1 of therollers outer ring 12 ranges from 7.25 to 9.75. - As shown in
FIG. 1 , theinner surface 13A of theroller assembly 10 includes a firstseal receiving pocket 40A formed between the first radially inwardly extending flange 13F1 and the firstaxial end 13X. A firstannular seal 50A is positioned in and seated in the firstseal receiving pocket 40A, as described herein. A portion (i.e., a radially innermost portion) of the firstannular seal 50A slidingly and sealingly engages the inner member 14 (i.e., anexterior surface 17A of the inner member 14). - As shown in
FIG. 1 , theinner surface 13 of the roller assembly includes a secondseal receiving pocket 40B formed between the second radially inwardly extending flange 13F2 and the secondaxial end 14Y. A secondannular seal 50B is positioned in and seated in the secondseal receiving pocket 40B. A portion (i.e., a radially innermost portion) of the firstannular seal 50A slidingly and sealingly engages the inner member 14 (i.e., anexterior surface 17B of the inner member 14). - As shown in
FIG. 2 a roller assembly for ayoke roller 200 is generally designated by thereference number 10′. Theroller assembly 10′ includes anouter ring 12′ having aninterior area 13′. Theinterior area 13′ is defined by aninner surface 13A′ extending an overall axial length L′ between a firstaxial end 13X′ and a secondaxial end 13Y′ of theouter ring 12′. Theinner surface 13A′ has a radially inward facing bearing surface 13B1′, 13B2′ extending between a first radially inwardly extending flange 13F1′ and a second radially inwardly extending flange 13F2′. - As shown in
FIG. 2 , theroller assembly 10′ includes aninner member 14′ extending into theinterior area 13′. Theinner member 14′ has agroove 15′ formed therein and located between oppositeaxial ends inner member 14′. A retainingring 16′ is positioned in thegroove 15′, as described herein. As shown inFIG. 4 the retainingring 16′ is a split ring having anannular body portion 16B′ and agap 16G′ therein. - As shown in
FIG. 2 , theinner member 14′ has abore 90′ extending therethrough. Thebore 90′ is defined by aninner surface 92′ of theinner member 14′. In one embodiment, theinner member 14′ is manufactured from a carbon steel alloy. In one embodiment, the exterior surfaces 14B1′ and 14B2′ of theinner member 14′ have a carburized case hardened case depth of 0.03 to 0.04 inches. In one embodiment, the exterior surfaces 14B1′ and 14B2′ have a surface hardness of 59 to 62 Rockwell C scale. In one embodiment, theinner member 14′ has a core hardness of 30 to 35 Rockwell C scale. - As shown in
FIG. 2 , theroller assembly 10′ includes a first row of a plurality offirst rollers 20′ positioned in theinterior area 13′ and in rolling engagement with theinner member 14′ (i.e., an exterior surface 14B1′ of theinner member 14′) and the radially inward facing bearing surface 13B1′. The first row of the pluralityfirst rollers 20′ is positioned axially between and engaging the retainingring 16′ (i.e., a firstaxial end 16A′ of the retainingring 16′) and the first radially extending flange 13F1′. - As shown in
FIG. 2 , theroller assembly 10′ includes a second row of a plurality ofsecond rollers 30′ positioned in theinterior area 13′ and in rolling engagement with theinner member 14′ (i.e., an exterior surface 14B2′ of theinner member 14′) and the radially inward facing bearing surface 13B2′. The second row of the pluralitysecond rollers 30′ is positioned axially between and engaging the retainingring 16′ (i.e., a secondaxial end 16B′ of the retainingring 16′) and the second radially extending flange 13F2′. - Thus, the first
axial end 16A′, secondaxial end 16B′, the first radially inwardly extending flange 13F1′ and the second radially inwardly extending flange 13F2′ limit axial movement of theouter ring 12′ relative to theinner member 14′. - As shown in
FIG. 2 , each of the plurality offirst rollers 20′ and each of the plurality ofsecond rollers 30′ have a roller length L1′. The ratio of roller length to roller outside diameter is less than 2.8 to provide increased load capacity compared to prior art roller assemblies. In one embodiment, the roller length L1′ is about 0.410 inches and the dynamic load capacity of theroller assembly 10′ is about 13,140 pounds. - Each of the plurality of
first rollers 20′ and each of the plurality ofsecond rollers 30′ has an outside diameter D1′ and theouter ring 12 has an outside diameter D′. A ratio of the outside diameter D1′ of therollers 20′, 30′ to the second outside diameter D′ of theouter ring 12′ ranges from 7.25 to 9.75. - As shown in
FIG. 2 , theinner surface 13A′ of theroller assembly 10′ includes a firstseal receiving pocket 40A′ formed between the first radially inwardly extending flange 13F1′ and the firstaxial end 13X′. A firstannular seal 50A′ is positioned in and seated in the firstseal receiving pocket 40A′, as described herein. A portion (i.e., a radially innermost portion) of the firstannular seal 50A′ slidingly and sealingly engages theinner member 14′ (i.e., anexterior surface 17A′ of theinner member 14′). - As shown in
FIG. 2 , theinner surface 13′ of theroller assembly 10′ includes a secondseal receiving pocket 40B′ formed between the second radially inwardly extending flange 13F2′ and the secondaxial end 14Y′. A secondannular seal 50B′ is positioned in and seated in the secondseal receiving pocket 40B′. A portion (i.e., a radially innermost portion) of the firstannular seal 50A′ slidingly and sealingly engages theinner member 14′ (i.e., anexterior surface 17B′ of theinner member 14′). - As shown in
FIG. 3 , the secondannular seal 50B has an overall axial width W. The secondannular seal 50B has a designed overall axial width W that consumes only 6% of the overall axial length L. The firstannular seal 50A is configured similar to the secondannular seal 50B and has the same thinness ratio as the secondannular seal 50B. While the overall axial widths W of the firstannular seal 50A and the secondannular seal 50B are described as being equal, the present invention is not limited in this regard. - As shown in
FIG. 3 , agroove 12G is formed in theinner surface 13A of theouter ring 12 axially outward of the second radially inwardly extending flange 13F2 and a lip 12L extending radially inward proximate the secondaxial end 13Y of theouter ring 12. - As best shown in
FIG. 3 , the secondannular seal 50B is a thin profile seal that includes anelastomeric member 60 secured to an annularmetallic ring 62. The annularmetallic ring 62 has a mountingsection 62M located circumferentially around a radially outermost portion of thereof. The metallicannular ring 62 has afirst leg 63 extending axially away and radially inward from the mountingsection 62M. Thefirst leg 63 has a radially and axially inward facing slopedsurface 63F. The metallicannular ring 62 has asecond leg 64 extending radially inward from thefirst leg 63 and terminating at adistal end 64D. The mountingsection 62M includes aflap 69 folded over a portion of the mountingsection 62M and forming a bend 67 on a radially outermost portion of the mountingsection 62M for seating in thegroove 12G of theouter ring 12 of theroller assembly 10. - As best shown in
FIG. 3 , theelastomeric member 60 has abase 60B secured to the radially and axially inward facing slopedsurface 63F. Theelastomeric member 60 has aflexible sealing leg 60L extending away from thebase 60B and the radially and axially inward facing slopedsurface 63F for sealing engagement with a portion of theexterior surface 17B of theinner member 14 of theroller assembly 10. Theflexible sealing leg 60L terminating at a sealingengagement surface 60X thereof. The sealingengagement surface 60X extends radially inward from thedistal end 64D of thesecond leg 64. The metallicannular ring 62 and theelastomeric member 60 have an overall axial width W configured to provide structural support and sealing. - The first
annular seal 50A and the secondannular seal 50B each have an overall axial width is from about 0.075 inches to about 0.080 inches. The designed thinness of the first and secondannular seals annular seal 50A and the secondannular seal 50B each have a designed axial width W which consumes no more than 6% of the overall length L of the outer ring. - The first
annular seals annular seal 50B′ are configured the same as the secondannular seal 50B. - Although the invention has been described with reference to particular embodiments thereof, it will be understood by one of ordinary skill in the art, upon a reading and understanding of the foregoing disclosure that numerous variations and alterations to the disclosed embodiments will fall within the scope of this invention and of the appended claims.
Claims (14)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US15/824,335 US10731743B2 (en) | 2011-11-16 | 2017-11-28 | Cam follower and yoke roller assemblies |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
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US201161560593P | 2011-11-16 | 2011-11-16 | |
US13/678,031 US20130118299A1 (en) | 2011-11-16 | 2012-11-15 | Cam follower for a ram of a necker machine and a method of manufacturing the same |
US14/577,126 US20150101387A1 (en) | 2011-11-16 | 2014-12-19 | Cam follower for a ram of a necker machine and a method of manufacturing the same |
US14/865,998 US9982768B2 (en) | 2014-09-25 | 2015-09-25 | Self lubricating cam follower assembly |
US15/046,158 US10274013B2 (en) | 2011-11-16 | 2016-02-17 | Cam follower with tire having axial movement compensating features |
US15/824,335 US10731743B2 (en) | 2011-11-16 | 2017-11-28 | Cam follower and yoke roller assemblies |
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US15/046,158 Continuation-In-Part US10274013B2 (en) | 2011-11-16 | 2016-02-17 | Cam follower with tire having axial movement compensating features |
Publications (2)
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US20180149257A1 true US20180149257A1 (en) | 2018-05-31 |
US10731743B2 US10731743B2 (en) | 2020-08-04 |
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US15/824,335 Expired - Fee Related US10731743B2 (en) | 2011-11-16 | 2017-11-28 | Cam follower and yoke roller assemblies |
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EP3336370A1 (en) * | 2016-11-30 | 2018-06-20 | Roller Bearing Company of America, Inc. | Cam follower and yoke roller assemblies |
US10274013B2 (en) * | 2011-11-16 | 2019-04-30 | Roller Bearing Company Of America, Inc. | Cam follower with tire having axial movement compensating features |
US10458468B2 (en) * | 2018-01-16 | 2019-10-29 | Roller Bearing Company Of America, Inc. | Cam follower for high axial load applications |
US10697493B2 (en) | 2018-02-15 | 2020-06-30 | Roller Bearing Company Of America, Inc. | Cam follower with multiple rows of independently operating bearings |
US11306807B2 (en) | 2018-11-16 | 2022-04-19 | Roller Bearing Company Of America, Inc. | Maintenance free extended life cam follower for a necker machine |
US11674584B2 (en) | 2018-11-16 | 2023-06-13 | Roller Bearing Company Of America, Inc. | Maintenance free extended life cam follower for a necker machine |
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US10274013B2 (en) | 2011-11-16 | 2019-04-30 | Roller Bearing Company Of America, Inc. | Cam follower with tire having axial movement compensating features |
US9982768B2 (en) | 2014-09-25 | 2018-05-29 | Roller Bearing Company Of America, Inc. | Self lubricating cam follower assembly |
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US10458468B2 (en) * | 2018-01-16 | 2019-10-29 | Roller Bearing Company Of America, Inc. | Cam follower for high axial load applications |
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US10274013B2 (en) * | 2011-11-16 | 2019-04-30 | Roller Bearing Company Of America, Inc. | Cam follower with tire having axial movement compensating features |
EP3336370A1 (en) * | 2016-11-30 | 2018-06-20 | Roller Bearing Company of America, Inc. | Cam follower and yoke roller assemblies |
US10458468B2 (en) * | 2018-01-16 | 2019-10-29 | Roller Bearing Company Of America, Inc. | Cam follower for high axial load applications |
US10697493B2 (en) | 2018-02-15 | 2020-06-30 | Roller Bearing Company Of America, Inc. | Cam follower with multiple rows of independently operating bearings |
US11306807B2 (en) | 2018-11-16 | 2022-04-19 | Roller Bearing Company Of America, Inc. | Maintenance free extended life cam follower for a necker machine |
US11674584B2 (en) | 2018-11-16 | 2023-06-13 | Roller Bearing Company Of America, Inc. | Maintenance free extended life cam follower for a necker machine |
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